RE: Re: JMeter and HdrHistogram Integration

[Mark Dawson]

Peter,   Yes, I do work in the HFT, and we do use low-latency infrastructure for exchange-facing infrastructure. However, the messaging platform deals with transferring pub/sub messages that can vary from 1KB to 1MB in size – that is decidedly *not* in the microsecond realm, even if it were on an Infiniband network communicating via ibverbs.   My interest is in response time measurements of various Message Bus products, so we’re talking millisecond scale for which tools like JMeter are more than enough. My issue is with the error-prone reporting with their Response Time Percentile Graph that I’ve noticed so far.   I think Gil’s suggestion gets me closer to what I thought I wanted. But the fact that I can’t make use of exponentially distributed request intervals, like what the new Precise Throughput Timer permits, makes me think we’ll have to craft our own (a fraught exercise all its own).     From: Peter Booth Sent: Saturday, December 21, 2019 1:21 PM To: mechanical-sympathy Subject: Re: JMeter and HdrHistogram Integration   Mark,   I don't know anything about your use-case but the fact that you're posting on mechanical sympathy  suggests that latency is important to you. If you are talking about low latency messaging, such as that  found n electronic trading then you should forget JMeter. Depending upon the age of your infrastructure, the use of lower latency NICs like Solarflare, Mellanox, low latency switches, TCP offload you could be interested in latency measurements in the low numbers of microseconds.    This testing is harder than it sounds when you consider the impact messages of varying sizes, realistic  topologies, slow consumers, different reliability constraints, ... It's easy to do this badly ( I have many times), and hard to do well.   I don't know your business context. If it's electronic trading and you are looking at  low latency messaging products (like 60East's AMPS, 29West lbm (now Informatica), Tibco's FTL, IBM's low latency messaging (now Cofinity), Aeron, ZeroMQ, Solace) then this is a solved problem. All the above come with benchmarking tools, but the best designed messaging benchmarks that I have seen are those done by STAC Labs.    The best independent benchmarking that I have seen is that performed by STAC Labs. They have benchmarked many of the products I listed. See https://stacresearch.com/stac-testing-tools   Hope this helps.   Feel free to email me directly if you want to chat.   Peter peter_booth *at* me.com On Friday, December 20, 2019 at 4:18:12 PM UTC-5, Mark E. Dawson, Jr. wrote: So our company is evaluating a set of messaging platforms, and we're in the process of defining non-functional requirements. In preparation for evaluating performance, I was considering suggesting JMeter since it appears to support testing messaging platforms (with several specific tutorials online). However, these tutorials show the Response Time by Percentile graphs from the tool, and they all appear to show evidence of CO. Does anyone know if the latest versions include support for HdrHistogram either out-of-the-box or via extra configuration? -- You received this message because you are subscribed to the Google Groups "mechanical-sympathy" group. To unsubscribe from this group and stop receiving emails from it, send an email to mechanical-sympathy+unsubscr...@googlegroups.com. To view this discussion on the web, visit https://groups.google.com/d/msgid/mechanical-sympathy/c84555b9-5ed1-42a9-a844-fe1204cdf16a%40googlegroups.com.   -- You received this message because you are subscribed to the Google Groups "mechanical-sympathy" group. To unsubscribe from this group and stop receiving emails from it, send an email to mechanical-sympathy+unsubscr...@googlegroups.com. To view this discussion on the web, visit https://groups.google.com/d/msgid/mechanical-sympathy/5dfe7c18.1c69fb81.9b697.e43e%40mx.google.com.